Bleaching montan wax



Patented Jan. 8, 1929.

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j Leeann WILI-IELM runes, on LUDWIGSHAEEN-ON}TI-Ill-RHINE, annfrnnonon- HELLTHALEB, or GRAnscHU'rz, GERMANY, ASSIGNORS TO I. e. rnnnnnannusrnrn ex remes SELLSCHAZET, OF FRANKFORT-QN-THE-MAIN, GERMANY,;A Colemanron onena- MANY.

BLEACHING MONTAN wax.

No Drawing. Application filed November 26,1927, Serial No. 236,004, anctin Germanylecenrber 3,, 192 6.-

VVe have found that crude or deresinified Montan wax can be bleached in a simple manner by exposing it, in a condition of solution or suspension, to the anodic action It is not essential, though generally advis able, to insert a porous diaphragm between the anode and the cathode, to prevent a;

loss of current. The porous diaphragm may i be replaced by a partition. of solid, impermeable material, such as glass, which does not extend quite to the bottom of the electrolyzing vessel. The strength of the current is preferably maintained at from about 300 to 500 amperes per square metre of the anode, and the tension at the electrodes, generally at between 3 and 5 volts.

Lead, for example, is found to be a very suitable electrode material, in which event lead peroxid is formed at the anode.

It is important that the Montan wax be in a very finely divided condition which may be furthered, for example, by energetically stirring the bath containing the crudeMontan wax during the action of the-current, and employing an elevated temperature, preferably about 100 C. In order to ensure better distribution, if necessary, volatile organic solvents such as benzine, benzene, and its derivatives and the like, or organic acids such as acetic acid, may be added to the Montan wax,

Montan wax bleached according to the present invention possesses practically the same properties as that obtained, for example, according to German" Patent No. 409,420, or U. S. application for Patent Ser. No. 218,853, filed September 10, 1927, and like that, maybe separated into various products for example in accordance with the application for U. S. Patent Ser. No. 218,- 854, filed September 10, 1927.

The following example will further illusferrer while stirring and heating the mixtrate the nature of the said invention which however is not limited thereto.

Emannplc.

A leaden vessel is charged with 40 per cent sulfuric acid containing from about 10 to. 100 grams of chromium sulfate in solution per litre. The leadeni vessel serves as the anode, and is connected to the positive cathode may consist of any convenlent-metal which resists the action of the electrolytes, and 1s preferably so constructed that it may be used as a stirrer; After the solution in ciently decolorized, the current is switched off and the stirrer stopped. The purified Montan wax then floats on the surface of the liquid, and can be run off while hot or taken off when. cold. I

What we claim is:

1. The process of bleaching Montan wax which comprises exposing Montan wax finely divided in an electrolyte in the presence of an oxygen transferrer to the anodic action of an electric current.

2. The process of bleaching Montan wax which comprises exposing ll iontanwax finely div ided in an electrolyte of low electric resistance, which stateof division is furthered by the addition of a volatileorganic solvent, to the anodic action of an electric current in the presenceof an oxygen trans-- ferrer. j

3. The process of bleaching Montan wax which comprises exposing Montan wax finely divided in an electrolyteoflow electric 'resistance to the anodic action-of an electric current in the presence of an oxygen trans ture to about 100 C.

4. The process of bleaching Mont-an wax pole of a source of electric current. 'lhe Which comprises exposing Montan Wax finely divided in sulfuric acid of 40 per cent strength to the anodic action of an electric current in the presence of an oxygen transcurrent of an intensity of between 300 to 500 ainperes per each square metre of the anode and of a tension of about 3 to 5 volts, in

7 the presence of an oxygen transferrer.

6. The process of bleaching lslontan Wax which comprises exposing Montan Wax fine- 1y divided 1n sulfuric acld of 40 per cent strength heated to about 100 C. to the anodic action of an electric current of an intensity of between 300 to 5003111138168 per each square metre of the anode and of a tension of about 3 to 5 volts, in the presence of-an oxygen transferrer while stirring.

In testimony whereof We have hereunto set our hands.

\VILHELM PUNGS. THEODOR HELLTH ALER. 

